- Provide large increases in acceleration and top-end speed
- Tuned for maximum peak horsepower and torque
- Repackable spiral-fluted core silencers
- Available without spark arrestors only
- Large-diameter steel headpipe included
| Compatible Vehicles | |||
| Years | Make | Make | Notes |
| 1986 | Yamaha | Tri Moto 225 YTM225DR | |
| 1983-1985 | Yamaha | Tri Moto 225 YTM225DX | |